Mandrel for forming paper receptacles.



D. 1. JENNINGS.

MANDREL FOR FORMING PAPER RECEPTACLES.

APPLICATION FILED MAY H1 H1.

1 ,273,497. Patented July 23, 1918.

DAVID J. JENNINGS, OF CLEVELAND, OHIO.

MANDREL FOR FORMING PAPER RECEPTAGLES.

Specification of Letters Patent.

Patented July 23, 1918.

Application filed May 14, 1917. Serial No. 168,359.

To all whom it may concern:

Be it known that I, DAVID J. JENNINGS, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of. Ohio, have invented a certain new and useful Improvement in Mandrels for Forming Paper Receptacles,'of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

I his invention relates to mandrels for forming paper receptacles wherein the blank forming the side walls of the receptacle is rolled about the mandrel, and during such rolling a head or internal groove is provided for the reception of the periphery of an end closure.

In forming such receptacle walls the mandrel is causedto roll over in contact with a platen, and an outwardly projecting bead on the mandrel presses the paper into a corresponding groove in the platen. The object of this inventionis to provide a simple efficient device for presenting the bead in operative position and causing its withdrawal upon the completion of the receptacle wall whereby the removal of the receptacle from the mandrel may be accomplished with convenience and without injury to the parts thus formed.

In the drawings I have shown a mandrel such as is used in a machine invented by me and illustrated, described and claimed in my application No. 184,999 filed August 8, 1917.

The accompanying drawings illustrate this mandrel in detail and the present invention is hereinafter more fully described in connectiontherewith, the essential char acteristics being set forth in the claims.

In the drawings Figure 1 is an end elevation of the mandrel, the shaft therefor bein sectioned; Fig. 2 is an axial section throug 1 the mandrel; Fig. 3 is a transverse section taken on the plane indicated by the line 33 of Fig. 2. The projection by which motion is transmitted to the bead sections is illustrated in dot and dash lines in Figs. 2, 3 and 4 asbeing in front of the plane of the sec tions of these figures. Fig. 4 is a sectional detail on a plane corresponding to Fig. 2

' illustrating the relative positions of the parts when the bead is collapsed; Fig. 5 is a detail showing the overlapping joint of the bead sectors.

Describing the parts by the use of reference characters 1 indicates the mandrel body shown as tapered in the form of a frustum of a cone and having a shaft 2 by which it 1s caused to roll upon a suitable platen for causing the paper to be wrapped around the same, thus forming the side of the receptacle. To pick up the end of the paper and cause 1t to follow the mandrel, I use (in the ma chlne represented in the application above referred to) air-pressure, by providing a vacuum passage 3 communicating with radial passages 4 terminating in a longitudinal opening 5 at the surface of the mandrel. At the larger end of the mandrel is a head member 6 positioned by a shoulder 8 and having its periphery forming a continuation of the surface of the mandrel. This head 6 is provided with a series of radial passages in which are slidably mounted shanks of the bead sectors 10. These sectors terminate in shoulders adapted to be retained and have their outward movement limited by an overhanging flange 7 of the head 6 integral with the shanks. -The beads are formed in sections preferably dividing the circle into six parts. The sectors have head portions 11 integral with the shanks 10 and provided with an outwardly extending rib or head 12 which, when the sectors are in their expand' ed position, coacts with the groove in the platen pressing the paper of the receptacle outwardly, forming a closure receiving groove, such as illustrated in my application on a machine for making paper receptacles, above designated.

To make the bead substantially continuous, when expanded, and still permit it to contract by drawing the sectors inwardly simultaneously, I provide at 13 cut-away portions on the adjacent ends of each sector forming overlapping members, the overla ping surfaces being cut to substantially t e center of the bead 12, as shown in Flg. 5.

The shanks 10 are provided with rigidly mounted pins 20 coacting with cam slots 23 ina relatively rotatable annulus shown as a flange 22. The cam slots have concentric portions and inwardly turned actuating portions 24, while the shanks of the sectors are cut-away to admit the flange 22, and on the periphery of this flange are a series of shoulders 25 each adapted when the bead is expanded to take the burden ofthe ressure against a coacting shoulder 26 on eac of the sectors.

It will be seen that by rotating the flange 22 a short di t nce he bead may be expand d or collapsed corresponding tion to the mandrel, causing the slots to move the sectors inwardly or outwardly, as desired. Thus, after a blank has been rolled onto the mandrel, the cam is actuated to' move the flange to bring the pins 20 into the portions 24 of the slots and at the same time bring a lower portion of the periphery of the flange between the shoulders 25 opposite the shoulders 26, thus withdrawingthe bead, bringing it within the periphery of the mandrel as indicated in Fig, 4.

. cured b In my application on a machine for making paper receptacles, previously herein designated I have shown a mandrel adapted to cut the blank forming the side of the receptacle from a single sheet. One of such knives is shown in the accompanying drawings at 32 as mounted on a disk 17 and positioned by dowelpins 33, This knife is preferably made in two parts and forms a continuation of the outwardly flaring periphery of the disk 17 and coacts with a knife on the platen. The knife sections may be se a clamp 35 having a series of spring 'ngers overhanging the knife and having a threaded shank -36 coacting with threads on the disk.

It will be noted that the cam 30, a cam sleeve 21 and the flange 22 being formed in one integral piece must necessarilybe cut away along the line 28 to permit the disk, knives and clamp to be passedover the cam 30 and into positionafter the cam and its flange have been assembled with the head and all the sectors.

Having thus described my invention, what I claim is:

1. A mandrel provided with a bead projecting from the surface thereof, said bead being formed of a series of sections, means formoving said sections toward and away from the axis of said mandrel, said means comprising a revolubly mounted annulus, inwardly extending members rigid with said bead sections, means connecting the annulus and said inwardly extending members for radially moving said sections consequent upon a relative rotation of the annulus and bead sections, said annulus having shoulders, and shoulders on the'inwardly extending members coacting therewith to receive the inward thrust on the bead sections.

2. The combination with a mandrel, a bead adapted to project from the surface thereof intermediate the ends of the mandrel, said head comprising a series of circumferentially alined sectors, radially movable slides rigid with the sectors, guideways formed within the mandrel embracing said slides, means actuating said slides to expand and contract the bead including a ring-like member provided with a series of arcuate shoulders concentric of the mandrel, complementary shoulders on the slides, the shoulders being arranged to receive the inward thrust on the bead sectors when it is expanded,

3. The combination adapted to roll the wallof a receptacle, a bead for forming a groove in said wall intermediate its ends, said bead comprising a series of alined segment-shaped members on which the bead sections are formed, slides radially movable within the mandrel, and carrying the segment members, each of said slides having a shoulder extending longitudinally of the mandrel, said mandrel having an overhanging portion engaging each of said shoulders and limiting the outward movement of the bead, and means for moving the bead sections inwardly and out wardly.

4;. The combination with a mandrel, a bead adapted to project from, the surface thereof comprising a series of movable sections, means for moving the sections including a revoluble member connected with said sections, a member connected with the revoluble member and projecting outwardl with signature.

DAVID JENNINGS.

with a mandrel 

